The Ben Hai River is a river in Vietnam that serves as a natural border between North Vietnam and South Vietnam. It flows into the South China Sea and is approximately 100 kilometers long. The river gained historical significance during the Vietnam War, as it marked the dividing line between the two regions. The river is known for its scenic beauty, surrounded by lush landscapes and diverse wildlife. It is also a popular spot for fishing and boating. The Ben Hai River remains an important symbol of the country's history and its journey towards reunification.